Numerical Analysis and Experimental Study of Gun Barrel’s Two-dimensional Transient Temperature Field

Abstract

Abstract. This paper aims at gun erosion under the condition of periodic thermal shock during firing. Firstly, the mathematical model with two-dimensional heat conduction for gun barrel was established. Secondly, finite difference equations of internal nodes were derived by using ADI (Alternating-Difference-Implicit) scheme, and the finite difference schemes of internal and external nodes under convective boundary conditions were obtained by using energy balance method. Thirdly, gun barrel's temperature distribution was calculated numerically by FORTRAN programming based on the numerical results of interior ballistics with quasi-two-phase flow. Finally, the measurement experiment on gun barrel's transient temperature field was carried out, and the numerical simulation results show excellent agreement with the experimental results. This research has great importance for the further studies of gun barrel erosion mechanism.